Some of my ancestors served in British India during the Raj. During that time several children were born there. Yesterday I came across naturalisation papers to get British citizenship for one of them. I have never come across this before, for any of the others in my tree. I had thought children born to British citizens serving in India in the 1800s were considered British subjects. The person in question was born in 1890, came back to UK for school(stayed with aunt), then joined the army and worked through the ranks, serving in WW1 and WW2. The people I've asked have explained current emigration rules eg for someone born in India in 1990 but I understand the current rules, it's the historical ones I am confused about.